
Enviado em 30/04/2021 - 10:19h
Boa noite pessoal,class AES_Key
{
private:
// Containers:
unsigned char Key[16];
std::vector<std::vector<unsigned char>> RoundKeys{};
// Auxiliary Functions:
void RotWord(std::vector<unsigned char>& word) {
unsigned char temp{word.at(0)};
word.at(0) = word.at(3);
word.at(3) = temp;
for (unsigned short i{0}; i <= 1; i++) {
temp = word.at(i);
word.at(i) = word.at(i+1);
word.at(i+1) = temp;
}
}
void SubWord(std::vector<unsigned char>& word) {
for (unsigned short i{0}; i < 4; i++)
word.at(i) = AES_SubTable[word.at(i)];
}
static unsigned short Rcon(unsigned short Round) {
Round /= 4;
switch (Round) {
case 1: return 0x1;
case 2: return 0x2;
case 3: return 0x4;
case 4: return 0x8;
case 5: return 0x10;
case 6: return 0x20;
case 7: return 0x40;
case 8: return 0x80;
case 9: return 0x1B;
case 10: return 0x36;
default: throw 0;
}
}
// Functions:
void ExpandKey() {
// Generate the first 4 words:
std::vector<std::vector<unsigned char>> words{};
for (unsigned short i{0}; i < 4; i++) {
words.push_back(std::vector<unsigned char>{});
words.back().push_back(this->Key[4*i]);
words.back().push_back(this->Key[4*i+1]);
words.back().push_back(this->Key[4*i+2]);
words.back().push_back(this->Key[4*i+3]);
}
// Generate the next 40 words:
std::vector<unsigned char>* temp{nullptr};
for (unsigned short i{4}; i < 44; i++) {
temp = &words.at(i-1);
if ((i % 4) == 0) {
RotWord(*temp);
SubWord(*temp);
temp->at(0) ^= Rcon(i);
}
words.push_back(std::vector<unsigned char>{});
std::vector<unsigned char>* xorword{&words[i-4]};
for (unsigned short j{0}; j < 4; j++) {
words.back().push_back(xorword->at(j) ^ temp->at(j));
}
}
// Construct Round Keys:
}
public:
// Constructors:
AES_Key(const char* key) { ///// Padding not implemented yet /////
for (unsigned short i{0}; i < 16; i++)
this->Key[i] = (unsigned char)key[i];
this->ExpandKey();
}
// Getters:
unsigned char* InitialKey() {return this->Key;}
std::vector<unsigned char> RoundKey(unsigned short Round) {return this->RoundKeys[Round];}
};
LazyDocker – Interface de Usuário em Tempo Real para o Docker
Instalando COSMIC no Linux Mint
Turbinando o Linux Mint: o poder das Nemo Actions
Inteligência Artificial no desenvolvimento de software: quando começar a usar?
[Resolvido] Algo deu errado ao abrir seu perfil
Usando o VNSTAT para medir o seu consumo de internet
Habilitando clipboard manager no ambiente COSMIC
Quando vocês pararam de testar distros? (12)
Problema com som no laptop (3)
Não estou conseguindo fazer funcionar meu Postfix na versão 2.4 no Deb... (2)









